$ git clone -n https://src.fedoraproject.org/rpms/polari.git /var/lib/mock/f40-build-832535-14883/root/chroot_tmpdir/scmroot/polari
Cloning into '/var/lib/mock/f40-build-832535-14883/root/chroot_tmpdir/scmroot/polari'...
$ git fetch origin 91aea39b041b40941323d4a06442ea3e05fb9a79:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/polari
 * [new ref]         91aea39b041b40941323d4a06442ea3e05fb9a79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91aea39 Update to 46.0